Light deflector



March 24, 1942, Q BOMMER 2,277,626

LIGHT DEFLEGTOR Filed May 25, 1940 INVENTOR- 44am C3424 Bow/EA ATTORNEY Patented Mar. 24, 1942 OFFICE LIGHT DEFLECTOR Alois Carl Bommer, Zurich, Switzerland Application May 25, 1940, Serial No. 337,138 In Switzerland December 23, 1938 10 Claims. (01.240485) The present invention relates to a device for dimming and dividing the light of an incandescent lamp arranged in the reflector of a head light, particularly in motor vehicles.

The'device according to the present invention comprises inclined wings producing the effect of dimming the direct rays substantially in a forward direction and of deflecting them in a vertical direction, laterally and backwards, the said wings being united by two lateral bridges to a semi-annular back supporting member to which is secured a screening cap.

The device according to the present invention directs much more direct rays to the reflector, thereby producing beams of light rays of increased brightness and giving an illumination on agreater distance and width, and assures that no direct rays are projected forwards.

Several preferred embodiments of the device according to the invention are illustrated in the accompanying drawing, viz.:

Fig. 1 is a side view of a device according to the invention;

Fig. 2 is a front view Fig.

Fig. 3 is a horizontal sectional view taken along line IIIIII in Fig. 1;

Fig. 4 a vertical sectional view taken along line IV-IV of Fig. 2;

Fig. 5 illustrates means for determining the accurate position in which the device according to the invention is to be secured;

Fig. 6 is a side view of a modified arrangement according to the invention;

Fig. '7 illustrates means for connecting the device according to the invention with the incandescent lamp;

Fig. 8 illustrates modified means for connecting the device according to the invention with an incandescent lamp;

Fig. 9 is a front view of another modification of the invention;

Fig. 10 is a vertical sectional view of part of the device shown in Fig. 9.

Referring to the embodiment of the device according to the invention illustrated in Figs. 1-4, the dimming of the direct rays in a forward direction and their backward deflection is effected substantially by means of two pairs of inclined wings arranged on a frontal hub I. One of said pairs comprises two lateral wings 4 and the other an upper and a lower wing l2. In the embodiment shown, the pairs of wings are arranged symmetrically in relation to the axis on the lamp and the wings of each pair are similarly inof the device shown in clined to the axis of the lam in a forward direction. The upper and lower wings l2 are larger and have a greater inclination to the axis of the lamp as the lateral wings 4.

Hub I is connected by means of two lateral bridges l3 to a semi-annular back supporting member 9, to the bottom of which is secured a screening cap 6. On this screening cap is provided a boss 8 projecting a sharply determined beam of light rays to the upper half of the reflector and from there on the road, since the screening cap 6 is arranged below the bulb It. The screening cap 6 comprises an upstanding margin l4 inclined to the vertical plane and the width of which is larger on its anterior part as on its posterior part. I

In order to secure the dimming device on the lamp base, the semi-annular part 9 is completed by an identical part 9', the two parts being assembled together by means of screws such as to form a collar.

However, as shown in Fig. 7, part 9 may also be linked to the other part 9 and comprise a clamping lever I5 in order to clamp the collar on the lamp base I I.

The bridges I3 are slightly inclined relatively to the horizontal plane and are situated somewhat -below the horizontal plane passing through the filament of the lamp. The margin M of the screening cap 6 is arranged parallelly to the bridges l3. a

As a substantial requirement, these dimming devices must be mounted in an accurately determined position in relation to the axis of the lamp. In order to assure this mounting, the dimming device comprises at its semi-annular securing back member 9 a protruding portion Hi the dimensions of which correspond to those of the protruding part [1 of the lamp base II, and the latter comprises a protruding member I8 diametrically opposed to the protrusion I! and of greater width than the latter. The mounting of the dimming device in its exact position is effected by means of a sleeve type gauge I9 Fig. 5 adapted for individually setting two dimming devices and two light bulbs at the same time. The ends of gauge l9 are individually provided with two sets of diametrically opposed slots I1 and [8' corresponding to the width of the protrusions I6, I"! and I8 respectively. The bulbs and the back member 9 can only be fully inserted when lugs l6 and II are in correct relative position.

In case the lamp-base comprises pins for bayonet type assemblage with the socket, these pins serve in a similar manner as protrusions l1 and I8 of the lamp-socket as fixing points for the exact mounting of the dimming device by means of a gauge.

In the embodiment of the invention shown in Fig. 6, the screening cap 6 is inclined in relation to the bridge, its margin l4 and the bridge enclosing thereby an acute angle.

The wings and the screening cap may be made of sparkling material, or else of a usual material with a mat, smooth or corrugated surface. At the ends of one or of several of the wings may be provided upstanding reflectors.

It may occur that the space between the lamp holder, the lamp base and the glass bulb is very restricted and that there is no sufficient place to secure the device by means of the clamping collar illustrated in Fig. '7. In this case, the arrangement for securing the dimming device on the bulb is such, as shown in Figv 8, that the lateral bridges l3 are divided and their individual parts are joined together by means of tensioning levers 22, the dimming device being thereby clamped to the bulb by a traction exerted in a vertical plane. Preferably a spring 23 is inserted at the front between said assembling means and the glass bulb, the back support being constituted by the semiannular securing member 9".

Preferably, the margin of the head light glass is covered by a color diaphragm strip which may be of diverging density.

Provision may be made for permitting a radial expansion of the wings. An arrangement of this kind is represented in Figs. 9 and 10. In this arrangement, a movable wing 24 is superposed on each wing l2 in such a manner as to permit a shifting outwards in a radial direction. On the back side of the movable wing 24 is secured a screw bolt 26 passing through a radial slot 25 in the midst of the corresponding wing I2. A flynut 21 screwed onto the screw 26 permits an easy adjustment of the movable wings each of which may be provided on one of its margin with a scale for an exact setting.

I claim:

1. In combination with an electric light bulb a dimming and light dividing system, comprising frontal reflector means disposed at the forward end of said bulb, lateral flap means extending substantially laterally from said frontal reflector means, flap means extending substantially upwardly from said frontal means and overlapping the upper edges of said lateral flap means, another flap means extending downward from said frontal reflector means and overlapping the lower edges of said lateral flap means, holding means disposed around the rear portion of said bulb, narrow lateral bridge means connected to and extending laterally rearward adjacent said bulb from said lateral flap means to said holding means, and a flap-like shield means connected with the lower part of and extending substantially forward from said holding means.

2. The combination claimed in claim 1 in which said flap means are pairwise symmetrically set with respect to the longitudinal axis of said system and forming substantially the same angle with said axis.

3. The combination claimed in claim 1 in which said flap means extending upward and downward are larger than the lateral flap means.

4. The combination claimed in claim 1 in which said flap means extending upward and downward are larger than the lateral flap means and comprise a, portion rigidly connected with said frontal reflector, and a portion radially displaceably connected with said first mentioned portion.

5. The combination claimed in claim 1 in which said holding means are composed of fractional collar means hinged together at one end thereof, and clamping means for clamping together the other ends of said collar means.

6. The combination claimed in claim 1 in which said bridge means are composed of individual parts and clamping means clamping together said individual parts.

'7. The combination claimed in claim 1 in which rearwardly extending resilient means are connected with said frontal reflector, and said bridge means are composed of individual parts and clamping means clamping together said individual parts.

8. The combination set forth in claim 1 in which said shield means are of half-shell configuration and have a root portion connected with said holding means and a substantially rotund edge portion extending from said root portion and being adjacent to the bulb surface.

9. The combination set forth in claim 1 in which said shield means are of half-shell configuration and have a root portion connected with said holding means and a substantially rotund edge portion extending from said root portion and being adjacent to the bulb surface and a strip-like rim portion extending substantially laterally and downward from said edge portion.

10. The combination set forth in claim 1 in which said shield means are of half-shell configuration and have a root portion connected with said holding means and a substantially rotund edge portion extending from said root portion and being adjacent to the bulb surface and a strip-like rim portion extending substantially laterally and downward from said edge portion, the width of said rim portion being greatest at the forward part thereof and being gradually reduced towards the rear parts of said rim portion.

ALOIS CARL BOMMER. 

